After I finish windows on a car I like to take it outside and look for any dirt or streaks. There was always the lightest of blue streaks on the windows that other people wouldn't notice, but would drive me crazy. I bought these the other day and used them on my windows after using foaming glass cleaner and a terry. I have never been more satisfied with a microfiber before. There was no lint and the windows looked perfect. Just make sure that you only wash these with specialized towel detergent. I'm actually going to get a few more of these towels.